Engineering:Caterpillar C27

Caterpillar C27
Overview
Manufacturer	Caterpillar Incorporated
Production	1983–2004 (as 3412) 2000- (as C27)
Layout
Configuration	Four-stroke V12
Displacement	27 L (1,648 cu in)
Cylinder bore	137 mm (5.4 in)
Piston stroke	154 mm (6.1 in)
Compression ratio	16:1
RPM range
Idle speed	545
Redline	2100
Combustion
Turbocharger	Double
Fuel system	Unit injection (see management)
Management	Electronic (ACERT) with mechanical failsafe
Fuel type	Diesel
Oil system	Wet sump
Cooling system	Water cooled
Output
Power output	783 kW (1,050 hp) @ 2100 rpm (marine/military rating)
Torque output	4,798 N⋅m (3,539 lbf⋅ft) @ 1400 rpm
Dimensions
Dry weight	3 tonnes (3.0 long tons; 3.3 short tons)
Emissions
Emissions target standard	Euro V or IMO IV
Emissions control technology	Exhaust gas recirculation Selective catalytic reduction
Chronology
Predecessor	Caterpillar 34 series engine
Successor	Caterpillar C32

The Caterpillar C27 is a V12 diesel internal combustion engine made by Caterpillar. The engine is 27 litres (1,648 cu in) in displacement. Each cylinder has a bore of 137 mm (5.4 in) and a stroke of 154 mm (6.1 in). The engine can produce 370–750 kW (500–1,000 hp) at 2100 RPM. The peak torque occurs at an engine speed of 1400 RPM. This engine began production as Caterpillar 3412. As emissions control was tightened, engine management and combustion chamber is redesigned therefore two different engines emerged: the mechanically controlled C27 and electronically controlled C30. Caterpillar C30 block has been scaled up and C32 emerged. C27 also began to be produced with electronic engine control and management after 2007.